:root{
  --bg:#0f1115;
  --card:#151a21;
  --text:#e8edf5;
  --muted:#a7b0bf;
  --line:#232b36;
  --link:#7db2ff;
}

*{ box-sizing:border-box; }
html,body{ height:100%; }

body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.wrap{
  width:min(1100px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header{
  position: sticky;
  top:0;
  z-index:10;
  background: rgba(15,17,21,.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.nav{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
  padding: 14px 0;
}

.nav a{
  color: var(--muted);
  text-decoration:none;
  padding:8px 12px;
  border-radius: 10px;
  transition: background .15s ease, color .15s ease;
}

.nav a:hover{
  color: var(--text);
  background: rgba(255,255,255,.05);
}

main{
  padding: 24px 0;
}

.card{
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px;
  box-shadow: 0 10px 30px rgba(0,0,0,.25);
}

.content{
  line-height:1.6;
}

.content h1,
.content h2,
.content h3{
  line-height:1.25;
  margin-top:0;
}

.content p{
  margin: 0 0 14px;
}

.content a{
  color: var(--link);
}

.content img{
  max-width:100%;
  height:auto;
  border-radius: 12px;
}

.site-footer{
  border-top: 1px solid var(--line);
  padding: 18px 0;
  color: var(--muted);
  font-size: 13px;
}